<?php
/**
 +------------------------------------------------------------------------------
 * Http 工具类
 * 提供一系列的Http方法
 +------------------------------------------------------------------------------
 */
namespace Org\Net;
class Http {
	
	/**
     +----------------------------------------------------------
	 * 采集远程文件
     +----------------------------------------------------------
	 * @access public
     +----------------------------------------------------------
	 * @param string $remote 远程文件名
	 * @param string $local 本地保存文件名
     +----------------------------------------------------------
	 * @return mixed
     +----------------------------------------------------------
	 */
	static public function curlDownload($remote, $local) {
		$cp = curl_init ( $remote );
		$fp = fopen ( $local, "w" );
		curl_setopt ( $cp, CURLOPT_FILE, $fp );
		curl_setopt ( $cp, CURLOPT_HEADER, 0 );
		curl_exec ( $cp );
		curl_close ( $cp );
		fclose ( $fp );
	}
	
	/**
    +-----------------------------------------------------------
	 * 使用 fsockopen 通过 HTTP 协议直接访问(采集)远程文件
	 * 如果主机或服务器没有开启 CURL 扩展可考虑使用
	 * fsockopen 比 CURL 稍慢,但性能稳定
    +-----------------------------------------------------------
	 * @static
	 * @access public
    +-----------------------------------------------------------
	 * @param string $url 远程URL
	 * @param array $conf 其他配置信息
	 * int   limit 分段读取字符个数
	 * string post  post的内容,字符串或数组,key=value&形式
	 * string cookie 携带cookie访问,该参数是cookie内容
	 * string ip    如果该参数传入,$url将不被使用,ip访问优先
	 * int    timeout 采集超时时间
	 * bool   block 是否阻塞访问,默认为true
    +-----------------------------------------------------------
	 * @return mixed
    +-----------------------------------------------------------
	 */
	static public function fsockopenDownload($url, $conf = array()) {
		$return = '';
		if (! is_array ( $conf )) {
			return $return;
		}
		$matches = parse_url ( $url );
		! isset ( $matches ['host'] ) && $matches ['host'] = '';
		! isset ( $matches ['path'] ) && $matches ['path'] = '';
		! isset ( $matches ['query'] ) && $matches ['query'] = '';
		! isset ( $matches ['port'] ) && $matches ['port'] = '';
		$host = $matches ['host'];
		$path = $matches ['path'] ? $matches ['path'] . ($matches ['query'] ? '?' . $matches ['query'] : '') : '/';
		$port = ! empty ( $matches ['port'] ) ? $matches ['port'] : 80;
		
		$conf_arr = array ('limit' => 0, 'post' => '', 'cookie' => '', 'ip' => '', 'timeout' => 15, 'block' => TRUE );
		
		foreach ( array_merge ( $conf_arr, $conf ) as $k => $v ) {
			${$k} = $v;
		}
		if ($post) {
			if (is_array ( $post )) {
				$post = http_build_query ( $post );
			}
			$out = "POST $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= 'Content-Length: ' . strlen ( $post ) . "\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cache-Control: no-cache\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
			$out .= $post;
		} else {
			$out = "GET $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
		}
		$fp = @fsockopen ( ($ip ? $ip : $host), $port, $errno, $errstr, $timeout );
		if (! $fp) {
			return '';
		} else {
			stream_set_blocking ( $fp, $block );
			stream_set_timeout ( $fp, $timeout );
			@fwrite ( $fp, $out );
			$status = stream_get_meta_data ( $fp );
			if (! $status ['timed_out']) {
				while ( ! feof ( $fp ) ) {
					if (($header = @fgets ( $fp )) && ($header == "\r\n" || $header == "\n")) {
						break;
					}
				}
				$stop = false;
				while ( ! feof ( $fp ) && ! $stop ) {
					$data = fread ( $fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit) );
					$return .= $data;
					if ($limit) {
						$limit -= strlen ( $data );
						$stop = $limit <= 0;
					}
				}
			}
			@fclose ( $fp );
			return $return;
		}
	}
	
	static public function fsockopen2($url, $conf = array()) {
		$return = '';
		$matches = parse_url ( $url );
		! isset ( $matches ['host'] ) && $matches ['host'] = '';
		! isset ( $matches ['path'] ) && $matches ['path'] = '';
		! isset ( $matches ['query'] ) && $matches ['query'] = '';
		! isset ( $matches ['port'] ) && $matches ['port'] = '';
		$host = $matches ['host'];
		$path = $matches ['path'] ? $matches ['path'] . ($matches ['query'] ? '?' . $matches ['query'] : '') : '/';
		$port = ! empty ( $matches ['port'] ) ? $matches ['port'] : 80;
		
		$conf_arr = array ('limit' => 0, 'post' => '', 'cookie' => '', 'ip' => '', 'timeout' => 15, 'block' => TRUE );
		
		foreach ( array_merge ( $conf_arr, $conf ) as $k => $v ) {
			${$k} = $v;
		}
		if ($post) {
			if (is_array ( $post )) {
				$post = http_build_query ( $post );
			}
			$out = "POST $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "Content-Type: application/x-www-form-urlencoded\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= 'Content-Length: ' . strlen ( $post ) . "\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cache-Control: no-cache\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
			$out .= $post;
		} else {
			$out = "GET $path HTTP/1.0\r\n";
			$out .= "Accept: */*\r\n";
			//$out .= "Referer: $boardurl\r\n";
			$out .= "Accept-Language: zh-cn\r\n";
			$out .= "User-Agent: $_SERVER[HTTP_USER_AGENT]\r\n";
			$out .= "Host: $host\r\n";
			$out .= "Connection: Close\r\n";
			$out .= "Cookie: $cookie\r\n\r\n";
		}
		$fp = @fsockopen ( ($ip ? $ip : $host), $port, $errno, $errstr, $timeout );
		if (! $fp) {
			return '';
		} else {
			stream_set_blocking ( $fp, $block );
			stream_set_timeout ( $fp, $timeout );
			@fwrite ( $fp, $out );
			$status = stream_get_meta_data ( $fp );
			if (! $status ['timed_out']) {
				while ( ! feof ( $fp ) ) {
				if (!!$header = @fgets ( $fp )) {
						$head .= $header;
						if ($header == "\r\n" || $header == "\n") {
							break;
						}
					}
				}
				$stop = false;
				while ( ! feof ( $fp ) && ! $stop ) {
					$data = fread ( $fp, ($limit == 0 || $limit > 8192 ? 8192 : $limit) );
					$return .= $data;
					if ($limit) {
						$limit -= strlen ( $data );
						$stop = $limit <= 0;
					}
				}
			}
			@fclose ( $fp );
			return array('head'=>$head,'content'=>$return);
		}
	}
	
	
	/**
     +----------------------------------------------------------
	 * 下载文件
	 * 可以指定下载显示的文件名，并自动发送相应的Header信息
	 * 如果指定了content参数，则下载该参数的内容
     +----------------------------------------------------------
	 * @static
	 * @access public
     +----------------------------------------------------------
	 * @param string $filename 下载文件名
	 * @param string $showname 下载显示的文件名
	 * @param string $content  下载的内容
	 * @param integer $expire  下载内容浏览器缓存时间
     +----------------------------------------------------------
	 * @return void
     +----------------------------------------------------------
	 * @throws ThinkExecption
     +----------------------------------------------------------
	 */
	static public function download($filename, $showname = '', $content = '', $expire = 180) {
		if (is_file ( $filename )) {
			$length = filesize ( $filename );
		} elseif (is_file ( UPLOAD_PATH . $filename )) {
			$filename = UPLOAD_PATH . $filename;
			$length = filesize ( $filename );
		} elseif ($content != '') {
			$length = strlen ( $content );
		} else {
			throw_exception ( $filename . L ( '下载文件不存在！' ) );
		}
		if (empty ( $showname )) {
			$showname = $filename;
		}
		$showname = basename ( $showname );
		if (! empty ( $filename )) {
			$type = mime_content_type ( $filename );
		} else {
			$type = "application/octet-stream";
		}
		//发送Http Header信息 开始下载
		header ( "Pragma: public" );
		header ( "Cache-control: max-age=" . $expire );
		//header('Cache-Control: no-store, no-cache, must-revalidate');
		header ( "Expires: " . gmdate ( "D, d M Y H:i:s", time () + $expire ) . "GMT" );
		header ( "Last-Modified: " . gmdate ( "D, d M Y H:i:s", time () ) . "GMT" );
		header ( "Content-Disposition: attachment; filename=" . $showname );
		header ( "Content-Length: " . $length );
		header ( "Content-type: " . $type );
		header ( 'Content-Encoding: none' );
		header ( "Content-Transfer-Encoding: binary" );
		if ($content == '') {
			readfile ( $filename );
		} else {
			echo ($content);
		}
		exit ();
	}
	
	/**
     +----------------------------------------------------------
	 * 显示HTTP Header 信息
     +----------------------------------------------------------
	 * @return string
     +----------------------------------------------------------
	 */
	static function getHeaderInfo($header = '', $echo = true) {
		ob_start ();
		$headers = getallheaders ();
		if (! empty ( $header )) {
			$info = $headers [$header];
			echo ($header . ':' . $info . "\n");
		} else {
			foreach ( $headers as $key => $val ) {
				echo ("$key:$val\n");
			}
		}
		$output = ob_get_clean ();
		if ($echo) {
			echo (nl2br ( $output ));
		} else {
			return $output;
		}
	
	}
	
	/**
	 * HTTP Protocol defined status codes
	 * @param int $num
	 */
	static function sendHttpStatus($code) {
		static $_status = array (
			// Informational 1xx
			100 => 'Continue', 
			101 => 'Switching Protocols',
			// Success 2xx
			200 => 'OK', 
			201 => 'Created', 
			202 => 'Accepted', 
			203 => 'Non-Authoritative Information', 
			204 => 'No Content', 
			205 => 'Reset Content', 
			206 => 'Partial Content',
			// Redirection 3xx
			300 => 'Multiple Choices', 
			301 => 'Moved Permanently', 
			302 => 'Found', // 1.1
			303 => 'See Other', 
			304 => 'Not Modified', 
			305 => 'Use Proxy', 
			// 306 is deprecated but reserved
			307 => 'Temporary Redirect',
			// Client Error 4xx
			400 => 'Bad Request', 
			401 => 'Unauthorized', 
			402 => 'Payment Required', 
			403 => 'Forbidden', 404 => 'Not Found', 
			405 => 'Method Not Allowed', 
			406 => 'Not Acceptable', 
			407 => 'Proxy Authentication Required', 
			408 => 'Request Timeout', 
			409 => 'Conflict', 
			410 => 'Gone', 
			411 => 'Length Required', 
			412 => 'Precondition Failed', 
			413 => 'Request Entity Too Large', 
			414 => 'Request-URI Too Long', 
			415 => 'Unsupported Media Type', 
			416 => 'Requested Range Not Satisfiable', 
			417 => 'Expectation Failed',
			// Server Error 5xx
			500 => 'Internal Server Error', 
			501 => 'Not Implemented', 
			502 => 'Bad Gateway', 
			503 => 'Service Unavailable', 
			504 => 'Gateway Timeout', 
			505 => 'HTTP Version Not Supported', 
			509 => 'Bandwidth Limit Exceeded' 
		);
		if (isset ( $_status [$code] )) {
			header ( 'HTTP/1.1 ' . $code . ' ' . $_status [$code] );
		}
	}
} 
//类定义结束
if (! function_exists ( 'mime_content_type' )) {
	/**
     +----------------------------------------------------------
	 * 获取文件的mime_content类型
     +----------------------------------------------------------
	 * @return string
     +----------------------------------------------------------
	 */
	function mime_content_type($filename) {
		static $contentType = array (
			'ai' => 'application/postscript', 
			'aif' => 'audio/x-aiff', 
			'aifc' => 'audio/x-aiff', 
			'aiff' => 'audio/x-aiff', 
			'asc' => 'application/pgp', //changed by skwashd - was text/plain
			'asf' => 'video/x-ms-asf', 
			'asx' => 'video/x-ms-asf', 
			'au' => 'audio/basic', 
			'avi' => 'video/x-msvideo', 
			'bcpio' => 'application/x-bcpio', 
			'bin' => 'application/octet-stream', 
			'bmp' => 'image/bmp', 
			'c' => 'text/plain', // or 'text/x-csrc', //added by skwashd
			'cc' => 'text/plain', // or 'text/x-c++src', //added by skwashd
			'cs' => 'text/plain', //added by skwashd - for C# src
			'cpp' => 'text/x-c++src', //added by skwashd
			'cxx' => 'text/x-c++src', //added by skwashd
			'cdf' => 'application/x-netcdf', 
			'class' => 'application/octet-stream', //secure but application/java-class is correct
			'com' => 'application/octet-stream', //added by skwashd
			'cpio' => 'application/x-cpio', 
			'cpt' => 'application/mac-compactpro', 
			'csh' => 'application/x-csh', 
			'css' => 'text/css', 
			'csv' => 'text/comma-separated-values', //added by skwashd
			'dcr' => 'application/x-director', 
			'diff' => 'text/diff', 
			'dir' => 'application/x-director', 
			'dll' => 'application/octet-stream', 
			'dms' => 'application/octet-stream', 
			'doc' => 'application/msword', 
			'dot' => 'application/msword', //added by skwashd
			'dvi' => 'application/x-dvi', 
			'dxr' => 'application/x-director', 
			'eps' => 'application/postscript', 
			'etx' => 'text/x-setext', 
			'exe' => 'application/octet-stream', 
			'ez' => 'application/andrew-inset', 
			'gif' => 'image/gif', 
			'gtar' => 'application/x-gtar', 
			'gz' => 'application/x-gzip', 
			'h' => 'text/plain', // or 'text/x-chdr',//added by skwashd
			'h++' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
			'hh' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
			'hpp' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
			'hxx' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
			'hdf' => 'application/x-hdf', 
			'hqx' => 'application/mac-binhex40', 
			'htm' => 'text/html', 
			'html' => 'text/html', 
			'ice' => 'x-conference/x-cooltalk', 
			'ics' => 'text/calendar', 
			'ief' => 'image/ief', 
			'ifb' => 'text/calendar', 
			'iges' => 'model/iges', 
			'igs' => 'model/iges', 
			'jar' => 'application/x-jar', //added by skwashd - alternative mime type
			'java' => 'text/x-java-source', //added by skwashd
			'jpe' => 'image/jpeg', 
			'jpeg' => 'image/jpeg', 
			'jpg' => 'image/jpeg', 
			'js' => 'application/x-javascript', 
			'kar' => 'audio/midi', 
			'latex' => 'application/x-latex', 
			'lha' => 'application/octet-stream', 
			'log' => 'text/plain', 
			'lzh' => 'application/octet-stream', 
			'm3u' => 'audio/x-mpegurl', 
			'man' => 'application/x-troff-man', 
			'me' => 'application/x-troff-me', 
			'mesh' => 'model/mesh', 
			'mid' => 'audio/midi', 
			'midi' => 'audio/midi', 
			'mif' => 'application/vnd.mif', 
			'mov' => 'video/quicktime', 
			'movie' => 'video/x-sgi-movie', 
			'mp2' => 'audio/mpeg', 
			'mp3' => 'audio/mpeg', 
			'mpe' => 'video/mpeg', 
			'mpeg' => 'video/mpeg', 
			'mpg' => 'video/mpeg', 
			'mpga' => 'audio/mpeg', 
			'ms' => 'application/x-troff-ms', 
			'msh' => 'model/mesh', 
			'mxu' => 'video/vnd.mpegurl', 
			'nc' => 'application/x-netcdf', 
			'oda' => 'application/oda', 
			'patch' => 'text/diff', 
			'pbm' => 'image/x-portable-bitmap', 
			'pdb' => 'chemical/x-pdb', 
			'pdf' => 'application/pdf', 
			'pgm' => 'image/x-portable-graymap', 
			'pgn' => 'application/x-chess-pgn', 
			'pgp' => 'application/pgp', //added by skwashd
			'php' => 'application/x-httpd-php', 
			'php3' => 'application/x-httpd-php3', 
			'pl' => 'application/x-perl', 
			'pm' => 'application/x-perl', 
			'png' => 'image/png', 
			'pnm' => 'image/x-portable-anymap', 
			'po' => 'text/plain', 
			'ppm' => 'image/x-portable-pixmap', 
			'ppt' => 'application/vnd.ms-powerpoint', 
			'ps' => 'application/postscript', 
			'qt' => 'video/quicktime', 
			'ra' => 'audio/x-realaudio', 
			'rar' => 'application/octet-stream', 
			'ram' => 'audio/x-pn-realaudio', 
			'ras' => 'image/x-cmu-raster', 
			'rgb' => 'image/x-rgb', 
			'rm' => 'audio/x-pn-realaudio', 
			'roff' => 'application/x-troff', 
			'rpm' => 'audio/x-pn-realaudio-plugin', 
			'rtf' => 'text/rtf', 
			'rtx' => 'text/richtext', 
			'sgm' => 'text/sgml', 
			'sgml' => 'text/sgml', 
			'sh' => 'application/x-sh', 
			'shar' => 'application/x-shar', 
			'shtml' => 'text/html', 
			'silo' => 'model/mesh', 
			'sit' => 'application/x-stuffit', 
			'skd' => 'application/x-koan', 
			'skm' => 'application/x-koan', 
			'skp' => 'application/x-koan', 
			'skt' => 'application/x-koan', 
			'smi' => 'application/smil', 
			'smil' => 'application/smil', 
			'snd' => 'audio/basic', 
			'so' => 'application/octet-stream', 
			'spl' => 'application/x-futuresplash', 
			'src' => 'application/x-wais-source', 
			'stc' => 'application/vnd.sun.xml.calc.template', 
			'std' => 'application/vnd.sun.xml.draw.template', 
			'sti' => 'application/vnd.sun.xml.impress.template', 
			'stw' => 'application/vnd.sun.xml.writer.template', 
			'sv4cpio' => 'application/x-sv4cpio', 
			'sv4crc' => 'application/x-sv4crc', 
			'swf' => 'application/x-shockwave-flash', 
			'sxc' => 'application/vnd.sun.xml.calc', 
			'sxd' => 'application/vnd.sun.xml.draw', 
			'sxg' => 'application/vnd.sun.xml.writer.global', 
			'sxi' => 'application/vnd.sun.xml.impress', 
			'sxm' => 'application/vnd.sun.xml.math', 
			'sxw' => 'application/vnd.sun.xml.writer', 
			't' => 'application/x-troff', 
			'tar' => 'application/x-tar', 
			'tcl' => 'application/x-tcl', 
			'tex' => 'application/x-tex', 
			'texi' => 'application/x-texinfo', 
			'texinfo' => 'application/x-texinfo', 
			'tgz' => 'application/x-gtar', 
			'tif' => 'image/tiff', 
			'tiff' => 'image/tiff', 
			'tr' => 'application/x-troff', 
			'tsv' => 'text/tab-separated-values', 
			'txt' => 'text/plain', 
			'ustar' => 'application/x-ustar', 
			'vbs' => 'text/plain', //added by skwashd - for obvious reasons
			'vcd' => 'application/x-cdlink', 
			'vcf' => 'text/x-vcard', 
			'vcs' => 'text/calendar', 
			'vfb' => 'text/calendar', 
			'vrml' => 'model/vrml', 
			'vsd' => 'application/vnd.visio', 
			'wav' => 'audio/x-wav', 
			'wax' => 'audio/x-ms-wax', 
			'wbmp' => 'image/vnd.wap.wbmp', 
			'wbxml' => 'application/vnd.wap.wbxml', 
			'wm' => 'video/x-ms-wm', 
			'wma' => 'audio/x-ms-wma', 
			'wmd' => 'application/x-ms-wmd', 
			'wml' => 'text/vnd.wap.wml', 
			'wmlc' => 'application/vnd.wap.wmlc', 
			'wmls' => 'text/vnd.wap.wmlscript', 
			'wmlsc' => 'application/vnd.wap.wmlscriptc', 
			'wmv' => 'video/x-ms-wmv', 
			'wmx' => 'video/x-ms-wmx', 
			'wmz' => 'application/x-ms-wmz', 
			'wrl' => 'model/vrml', 
			'wvx' => 'video/x-ms-wvx', 
			'xbm' => 'image/x-xbitmap', 
			'xht' => 'application/xhtml+xml', 
			'xhtml' => 'application/xhtml+xml', 
			'xls' => 'application/vnd.ms-excel', 
			'xlt' => 'application/vnd.ms-excel', 
			'xml' => 'application/xml', 
			'xpm' => 'image/x-xpixmap', 
			'xsl' => 'text/xml', 
			'xwd' => 'image/x-xwindowdump', 
			'xyz' => 'chemical/x-xyz', 
			'z' => 'application/x-compress', 
			'zip' => 'application/zip' 
		);
		$type = strtolower ( substr ( strrchr ( $filename, '.' ), 1 ) );
		if (isset ( $contentType [$type] )) {
			$mime = $contentType [$type];
		} else {
			$mime = 'application/octet-stream';
		}
		return $mime;
	}
}

if (! function_exists ( 'image_type_to_extension' )) {
	function image_type_to_extension($imagetype) {
		if (empty ( $imagetype )) {
			return false;
		}
		switch ($imagetype) {
			case IMAGETYPE_GIF :
				return '.gif';
			case IMAGETYPE_JPEG :
				return '.jpg';
			case IMAGETYPE_PNG :
				return '.png';
			case IMAGETYPE_SWF :
				return '.swf';
			case IMAGETYPE_PSD :
				return '.psd';
			case IMAGETYPE_BMP :
				return '.bmp';
			case IMAGETYPE_TIFF_II :
				return '.tiff';
			case IMAGETYPE_TIFF_MM :
				return '.tiff';
			case IMAGETYPE_JPC :
				return '.jpc';
			case IMAGETYPE_JP2 :
				return '.jp2';
			case IMAGETYPE_JPX :
				return '.jpf';
			case IMAGETYPE_JB2 :
				return '.jb2';
			case IMAGETYPE_SWC :
				return '.swc';
			case IMAGETYPE_IFF :
				return '.aiff';
			case IMAGETYPE_WBMP :
				return '.wbmp';
			case IMAGETYPE_XBM :
				return '.xbm';
			default :
				return false;
		}
	}

}